Before you start
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Build It Fill the frames yourself — tap to add counters! 
Ten-Frame Add & Subtract Fill the frames to add and take away — make ten! 
Number Bonds Split a whole into two parts and put them back. 
Add & Subtract to 100 Hop along the number line with bigger numbers. Pick something to play
Build It Fill the frames yourself to build the sum — tap to add counters! Ten-Frame Add & Subtract Fill the frames to add and take away — make ten! Number Bonds Split a whole into two parts and put them back. Tens & Ones Bundle ten ones into a ten-rod — see the number. Add & Subtract to 100 Hop along the number line with bigger numbers. Count By Skip-count by 2s, 5s, and 10s — spot the pattern and fill the missing number. Story Problems Read a story and pick the number sentence that matches. Fact Fluency Practice facts till they pop — no clock, ever!
Meet the cast — the characters who teach this
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Sumi Add & subtract (counting on / back) — a warm acorn-orange squirrel kid who hops forward and back along a number line to add and take away; dotted jump-arcs mark each equal hop -
Pippa Number bonds / fact families (part–part–whole) — a soft cream-and-grey rabbit kid who splits a pile into two parts and joins them back; two little baskets and one whole basket beside her -
Tenny Place value (tens & ones) — a friendly many-segmented centipede kid whose ten body-segments bundle into a ten-rod and unbundle into ones; a tidy ten-rod and loose unit-cubes beside her -
Zippy Fact fluency (anti-shame) — a quick bright hummingbird kid who recalls a fact in a snap and helps you practice till it pops; a gentle glow, never a timer or a buzzer