Theory:

Meanings of difficult words from the lesson "A Different Kind of School":
 
Sl. No.
Words
Meanings
1
ChanceOpportunity
2
Great dealA lot
3
In sightTo be seen
4
LedGuide someone in their movement, mostly by holding their hands
5
Flower-beds
A garden plot in which flowers are grown
6
All that I had expected
As imagined or expected
7
Middle-agedSomeone whose age is between 45 and 65
8
AuthorityThe power to give orders, make decisions, and enforce obedience
9
KindlyFriendly
10
PlumpStout; Pleasantly fat
11
HomesickExperiencing a longing for one's home during a period of absence from it
12
MethodPractise; system
13
RestBalance; what remains
14
TalksLecture; discussion
15
Keep their hands quietStudents are not expected to write anything
16
Practically
Almost; nearly; more or less
17
Thoughtfulness        Kindness and understanding. The ability to understand the feelings and the needs of the others
18
ResponsibleAware of their duties
19
OverlookHave a view of from above
20
Teach thought
Teaching usual subjects such as maths, science, literature, etc. Thought means ideas/ theories
21
GroundsPlaygrounds
22
JollyHappy
23
Trouble
Problem
24
At playPlaying
25
HopelessUnfortunate; without hope
26
CripplePhysically disabled; lame; someone who cannot walk without a support
27
LamePhysically disabled; someone who cannot walk without a support; cripple
28
Blind
Visually challenged; someone who cannot see with their eyes
29
SystemA set of principles or procedures; arrangement; structure
30
Appreciate   Recognise the full worth of it
31
MisfortuneProblem
32
Deaf
Someone who lacks the power of hearing
33
InjuredWounded; physically hurt
34
Dumb 
Someone who cannot speak; mute
35
Eyes are bandagedThey are blindfolded
36
Absolutely   Totally; completely
37
Are on their honourHave promised
38
PeepLooking secretively through a narrow gap
39
OvernightDuring the night
40
Crutch
A long stick used as a support under the armpit by a lame person
41
Passed on
Moved on; walked away
42
MiseryDifficulty; problem; sadness
43
Something of a game
Something interesting or exciting
44
ThoughtlessCareless; uncaring
45
BandageCloth to cover a wound; a strip of woven material used to bind up a wound or to protect an injured part of the body
46
Will-powerWill; determination
47
Exercise their will-powerUse their will-power
48
Gentleman A polite or formal way of referring to a man
49
AwfulVery bad; unpleasant
50
MomentA very brief period of time
51
Hit by
Bang or smash into something
52
Relief
Comfort
53
HelpersPeople who help or assist someone else
54
KindGood-natured; good-hearted
55
FairlyModerately good; not bad
56
My turnOpportunity; routine
57
GhastlyTerrible
58
Hopping
Jumping on one foot
59
TroublesomeDifficult
60
FrighteningScary
61
Walking up and down Walking backwards and forward
62
Very lightBlonde; yellowish; hair which is very light
63
GardenerA person who tends and cultivates a garden as a pastime or for a living
64
BlouseTop
65
Gradually Slowly
66
DiscoveredRealised; found out
67
Sorry to goFeeling sad to go
68
Something in the systemThe system is effective and worthwhile