Curated OER
Missing Numbers: Perceptual Level
In this missing numbers worksheet, students recall their counting forward and backward counting sequences as they add the missing numbers in 4 math puzzles.
E-learning for Kids
E Learning for Kids: Math: Llama Farm: Addition and Subtraction: Counting Forwards and Backwards
On this interactive site students learn to write 2-digit numbers, count forward and backward by tens and show subtraction facts.