|
Establish several
rules of thumb for length, eg : finger width (c.
1 cm), hand span ( 15 cm). Pupils to use own 'rules'
to estimate length of page, table, pencil …
Compare estimated lengths with measured lengths. |
|
· use names
& abbreviations of measurement units measure
/ estimate / calculate & solve problems in everyday
contexts involving :L, A, M, C & T
and
· convert one metric
unit to another (eg: g to kg)
and
· read & interpret
scales on a range of measuring instruments
· check a result by
considering whether it is of the correct order of
magnitude and by working the problem backwards |
|
words and symbols
for:
mm, cm
m, km
g, kg
ml, cl,
lmm², cm²
m², km²
°C
s, min, h
day, week
month
year
decade
century
millenium
area
capacity
length
mass
time
tempera- ture
depth
distance
high, height |
|
Estimate
L, A, C, M, & T in classroom, such as
room length; window area.
Measure and calculate
if necessary and compare with estimate. Use a rule
to convert units,
eg: m > cm. Stress the need for an approach combining
all 4 skills in future work.
(For imperial units: see Y8) |
|
· Circus
of short activities involving estimation, measurement,
calculation and conversion skills in:
L, A, C, M, T.
Eg: Estimate and mark 1 km from school on an enlarged
and wall-mounted street map from A-Z map ... a 1p
coin weighs 3 grams; does a 10p coin weigh 10 times
as much? Classroom temperature?
OR
· WS
NM3/2: Circus of Activities
(Includes an activity sheet for pupils)
Reference to the 4 skill areas: estimating / measuring
/ calculating / converting.
(Formative assessment: can use activity to assess
current knowledge, skills & understanding of
conversion rules for lesson 2) |
|
Use circus activities
to collect mental pictures of small,medium and large
units of L, A, C, M, T.
Eg: door height =2m; nail width 1cm; bag of sugar=1kg;
1/2 tsp sugar =1g.
(DISPLAY OPPORTUNITY: MENTAL PICTURES & RULES
OF THUMB) |
|
pp 228-231
Sparks 16: 'Match a Measure'
WS NM3/2: Circus of Activities
Eg: metre rule, rulers tape measure, various scales,
A-Z, a 1-litre lemonade bottle, measuring jugs cylinders
thermometer |
|
|
|
OHS NM3/4: Metric
System
Use circus and OHS to help review conversion rules
for mm, cm, m and km.
Use prefixes to predict rules for ml, cl, l, &
g, kg, tonne |
|
· Use Who
has ...?' Metric Cards (BASS) as a whole class activity
to link the skills of X and ¸ by powers of
10 to conversion rules within the metric system.
OR
Powers
of Ten
· Individual work on problems involving L,
A, C, M and T.
· OR create your own resources at;
Measurement
Worksheets
For an insight into how a pupils' weight varies
according to which planet they are on, visit:
Watch
Your Weight in Outer Space! |
|
| Choose one problem
from main activity; ask pupils to explain:- what
units used, what conversion rule, how they knew
when to x or ¸ |
|
|
