he Virtual Playground: an Educational Virtual Reality Environment for Evaluating Interactivity and Conceptual Learning

33. Cherry: One two three... one two three four five six seven eight... So it said
that it’s covered... one fifth... one fifth... is what it’s supposed to be.

34. Observer: It has to be one fifth more of what it is now. So, how many
blocks are there now?

35. Cherry: Ten.

36. Observer: Ok. So how many would you add if you were Spike?

37. Cherry: Five.

38. Observer: Spike has started already trying to add blocks. Where would you
add those blocks?

39. Cherry: There [showing the row of five tiles near the crawl tunnel]. Mmm,
no... there [pointing near the footpath]... mmm no... can you put them on the
yellow road?

40. Observer: I don’t know. Well look at Spike and tell me what you think he’s
doing.

41. Cherry: Oh, he’s putting it over there [pointing at the other side of where
she was thinking the blocks should go].

42. Observer: Ok, so how many blocks does he need to put?

43. Cherry: Two.

44. Observer: You said five before.

45. Cherry: No I mean there [showing the two tiles where the robot was already
putting the first block].

46. Observer: So finally how many blocks does he have to put to make this one
fifth bigger of what it is?

47. Cherry: Five.

48. Observer: So, he put one already. Where is he putting the second one?

49. Cherry: Next to the first one.

50. Observer: How about the others?

51. Cherry: Uhm, down there. Down on the left side [showing the row of five
tiles she had shown originally, next to the crawl tunnel]... No, uhm, on that bit
[showing the two tiles on the footpath]

52. Observer: How many more does he need to put?

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