Ten to fifteen minutes on most days beats an hour at the weekend, at every age in this range. Short and frequent is how facts move into memory. Long and rare is how children learn to dread the kitchen table.
For a five-year-old, ten minutes is the whole session. For a fifth grader you can stretch to twenty. If a sheet is regularly taking longer than that, the number of questions is too high — not the child too slow.
The single most useful thing you can do with a struggling child is set the grade lower and watch them succeed at something. It is not a step backwards. A fifth grader who is shaky on times tables needs Grade 3 fact practice, and giving them harder Grade 5 work instead just confirms to them that they are bad at math.
Nothing on this site records a grade or reports it anywhere. Pick whatever level gets your child working, and change it whenever you like.
How do I know which grade to pick?
Start with the grade they are in. If the first sheet is a struggle, drop one. If it is finished in two minutes, go up. The point is to find the level where they work steadily, not to match a school label.
My child hates worksheets. Is there any point?
Sometimes not, and it is worth being honest about that. Shorter sheets help more than anything else — eight questions, not forty. The mazes and picture activities are also genuine practice and rarely get refused.
Do I need to print in colour?
No. Everything is designed to print in black and white on an ordinary home printer, and the pictures are line drawings rather than photos so they stay sharp and use very little ink.
Is it really free?
Yes. No account, no email, no watermark and no limit on how many you make.