The Frustrating Phenomenon of Forgetting
If you have ever watched your child confidently recite multiplication facts one evening, only to find them staring blankly at the same facts the next morning, you are not alone. This maddening pattern is one of the most common frustrations parents face when helping children learn math. After hours of practice, flash cards, and worksheets, the knowledge seems to evaporate overnight, leaving both parent and child wondering what went wrong.
I remember this experience vividly with my own daughter, Emma. We spent an entire weekend practicing her 7s multiplication facts. By Sunday evening, she could rattle off 7x1 through 7x12 without hesitation. I was thrilled. But when I quizzed her on Tuesday, she could barely remember 7x3. Had she somehow lost the knowledge in just two days? Was all that practice wasted? I felt like we were taking one step forward and two steps back.
What I did not understand at the time was that this pattern of learning and forgetting is completely normal - and completely explainable. The problem was not with Emma's memory or effort. The problem was with how we were practicing. Traditional drill-based practice - repeating facts until they are memorized - produces fragile, easily forgotten knowledge. To build lasting recall, we need to understand how memory actually works and use strategies aligned with that understanding.
In this article, I will explain the science of why children forget math facts and share three research-backed strategies that actually produce lasting retention. These strategies transformed how Emma learned math facts and have helped countless students I have worked with since. If your child struggles with fact retention, these approaches can make a real difference.
The Science of Forgetting: What Really Happens
To understand why children forget math facts, we need to look at how memory works. In the late 19th century, psychologist Hermann Ebbinghaus discovered what he called the 'forgetting curve' - a predictable pattern showing how quickly information is lost over time when there is no attempt to retain it. Ebbinghaus found that within hours of learning something new, we forget about 50% of it. Within days, we forget up to 70%. This is not a sign of poor memory - it is how human brains work.
The reason traditional drill fails is that it creates memories through a process called 'massed practice' - cramming all practice into a single session. Massed practice produces quick learning but poor retention. The brain interprets information learned in one marathon session as temporarily important but not worth keeping long-term. So it discards the information almost as quickly as it was acquired. This is why your child can know their facts perfectly on Sunday and forget them by Tuesday.
The opposite of massed practice is 'spaced practice' - spreading learning across multiple sessions with time in between. Spaced practice feels slower because each session starts with some forgetting, but it produces far better long-term retention. The brain interprets information encountered repeatedly over time as important and worth storing permanently. Each time the brain has to retrieve a partially forgotten memory, that memory becomes stronger and more accessible.
This explains why Emma forgot her 7s after a weekend of cramming but remembered her 2s, which she had learned gradually over several weeks. The 2s were stored as long-term memories because they were encountered repeatedly over time. The 7s were stored as short-term memories because they were encountered intensively in a brief period. To help Emma retain the 7s, we needed to change not what we practiced but how we practiced.
Strategy 1: Spaced Practice for Lasting Retention
The first strategy that actually works is spaced practice - spreading learning across multiple short sessions rather than cramming into one long session. Instead of practicing math facts for an hour on Saturday, practice for 10 minutes daily. This approach feels less efficient in the short term but produces dramatically better retention in the long term. The brain needs time between sessions to consolidate memories, and the act of retrieving partially forgotten information strengthens those memories.
Implement spaced practice by establishing a daily math routine. Just 10-15 minutes of practice, 4-5 times per week, produces better results than hours of weekly drill. Our games at VCGames are perfect for this - a quick session of Multiplication Master or Flash Cards Frenzy fits easily into a daily routine. The key is consistency rather than intensity. A child who plays math games for 12 minutes daily will outperform a child who drills for an hour once a week.
When implementing spaced practice, do not try to practice everything every day. Instead, rotate through different fact sets or topics. On Monday, practice multiplication facts. On Tuesday, practice division facts. On Wednesday, return to multiplication but focus on different facts than Monday. This rotation ensures that each set of facts gets spaced practice while preventing the fatigue that comes from over-practicing any single topic.
Track progress to maintain motivation. Children often feel like they are not making progress with spaced practice because each session includes some review of previously learned material. Show them data - their improving accuracy, faster response times, growing streaks - to make progress visible. Our games provide this feedback automatically, showing children their growth over time. Seeing concrete evidence of improvement motivates continued practice.
Strategy 2: Interleaving for Flexible Thinking
The second strategy is called interleaving - mixing different types of problems within a single practice session rather than practicing one type at a time. Traditional practice often involves 'blocking' - solving all addition problems, then all subtraction problems, then all multiplication problems. Interleaving would mix these operations randomly, requiring the child to choose the appropriate operation for each problem.
Interleaving feels harder than blocking because the child must constantly switch mental gears. This difficulty is actually the point - the cognitive effort required by interleaving produces deeper learning and better retention. When children block practice, they can solve problems on autopilot without really thinking. When they interleave practice, they must actively engage with each problem, which produces stronger memories and more flexible thinking.
Research by psychologist Doug Rohrer has demonstrated the power of interleaving across multiple mathematics topics. In one study, students who practiced with interleaved problems performed worse during practice but dramatically better on a delayed test compared to students who practiced with blocked problems. The interleaved students had developed not just memorized procedures but the ability to choose appropriate strategies - a far more valuable mathematical skill.
To implement interleaving, mix problem types within practice sessions. If your child is practicing multiplication, mix in some addition and subtraction problems. If they are practicing fractions, include some whole number problems. Our Math Bingo Bash game naturally incorporates interleaving by mixing operations within each game. This mixed practice develops the flexible mathematical thinking that characterizes true mathematical proficiency.
Strategy 3: Retrieval Practice for Memory Strength
The third strategy is retrieval practice - actively recalling information from memory rather than passively reviewing it. When children simply reread math facts or look at flash cards, they create an illusion of knowing without actually strengthening memory. When they must recall facts from memory - as in answering quiz questions or solving problems - they strengthen the neural pathways that make recall faster and more automatic.
Retrieval practice is more effective than re-reading or reviewing because it forces the brain to reconstruct memories rather than simply recognize them. This reconstruction process strengthens the memory and makes it more accessible in the future. The struggle to retrieve a partially forgotten fact, while uncomfortable, is exactly what makes the memory stronger. Avoid the temptation to immediately show the answer when your child struggles - the struggle itself is productive.
Implement retrieval practice by having your child answer questions rather than review material. Use practice problems, quizzes, or - even better - math games that require active recall. Our games are designed around retrieval practice, requiring children to actively generate answers rather than passively select them. This active recall builds stronger, more durable memories than any amount of passive review.
For maximum effectiveness, combine retrieval practice with the spacing strategy discussed earlier. Have your child attempt to recall facts they learned yesterday, last week, and last month. Each successful retrieval strengthens the memory, while failed retrievals identify facts that need additional practice. This approach turns forgetting from a problem into a tool - the facts your child forgets are exactly the facts that need more spaced retrieval practice.
Putting It All Together: A Better Way to Practice
Combining spaced practice, interleaving, and retrieval practice creates a powerful approach to building lasting math fact fluency. Instead of cramming all multiplication facts into a weekend marathon, spread practice across daily 10-15 minute sessions. Mix different operations within each session to build flexible thinking. Use games and quizzes that require active recall rather than passive review. This approach feels slower initially but produces dramatically better long-term retention.
With my daughter Emma, this approach transformed her math fact learning. We abandoned weekend cramming sessions in favor of 12-minute daily game sessions. I mixed operations to keep her thinking flexibly. I let her struggle with retrieval rather than immediately providing answers. Within a month, her retention had improved dramatically. She still occasionally forgot a fact, but a single reminder was enough - the fact came back quickly because it was stored as a long-term memory.
If your child is stuck in the learn-and-forget cycle, try this approach for one month. Commit to 10-15 minutes of daily practice using our games, focusing on spaced practice, interleaving, and retrieval. Track progress to see the improvement. Most importantly, be patient - the brain takes time to consolidate memories, and the benefits of this approach compound over weeks rather than appearing instantly. The investment in better practice will pay off in lasting mathematical fluency.
Remember that forgetting is normal, not a sign that something is wrong with your child. The goal is not to prevent forgetting entirely but to build memories strong enough that forgotten facts can be quickly relearned. With the right approach, even children who have struggled with fact retention for years can develop the fluency that supports mathematical success. The key is working with how memory actually works rather than against it.