Level 2: Remembering

🔘 Hit The Button

💔 Nice or Nasty

🎲 Dicey Operations

➖ Subtraction Surprise

Level 3: Understanding

🍇 Fruity Totals

🌡️. Temperature

🔶 What's It Worth?

🐸. Frogs

🔢. Odds, Evens and More Evens

🔻 Picturing Triangular Numbers

🟩 Picturing Square Numbers

Level 4: Applying

🔺. Number Pyramids

🔻 More Number Pyramids

➕ Crossed Ends

🔲. Perimeter Expressions

🔢 Special Numbers

Level 5: Analyzing